Apparatus for pulverizing.



No. 69|,|63. Patented Ian. M, I902 W. F. McGLELLAN.

APPARATUS FOR PULVE RIZING.

(Application filed. Apr. 1, 1901.!

(No Model.) 2 Sheets-Sheet l.

$41 02 m toz QIVLMMQM m5 NORRIS PETERS 0o, PQoTo-uTnoH WASHINGTON. o. c.

No. 69!,I63. Patehtedjan. l4, m2.

- w. F. MGCLELLAN.

APPARATUS FOR PULVERIZING.

(Application filed Apr. 1, 1901.]

2 Sheets-Sheet 2.

(No Model.)

I/II/llll zllIIIl/lllllIl/Il/Ifl! witnesses awe amen sired result byconcussion.

I UNITED STATns aTnNT Trice.

YVIIJLIAM F. MCCLELLAN, OF SEATTLE, WASHINGTON.

APPARATUS FOR PULVERIZING.

SPECIFICATION forming part of Letters Patent No. 691,163, dated January14, 1902.

Application filed April 1,1901. Serial No. 53,871. (No model.)

To (LZZ 1072 0117, it may concern.-

Be it known that I, WILLIAM F. MoCLnL- LAN, a citizen of the UnitedStates, residing at Seattle, in the county of King and State ofWashington, have invented certain new and useful Improvements inApparatus for Pulverizing; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to improvements in pulverizers, and moreparticularly to that class of such devices in which opposing currents ofair, steam, water, or other gas or fluid areutilized for accomplishingthe de- It consists of means for feeding material to oppositely-disposedjets of gas or liquid and means for rotating said material in oppositedirections as the same is brought together by said jets.

It also consists of certain other novel construetions, combinations, andarrangements of parts, as will be hereinafter more fully described andclaimed.

In the accompanying drawings, Figure 1 represents a View in frontelevation of a pulverizer embodying the features of my invention. Fig. 2represents a view in side elevation of the same. Fig. 3 represents alongitudinal horizontal sectional view of the same on line 0900 ofFig. 1. Fig. 4 represents a horizontal longitudinal enlarged View of oneof the nozzles, and Fig. 5 represents in front elevation a detail viewof the rifled tip of one of the nozzles.

Referring to the drawings by numerals, 1 indicates any preferred form ofhopper for containing the material to be pulverized, and any desiredform of conduit-s, as 2 2, are provided for conducting the material fromsaid hopper to the position of operation at their lower ends, as at 33.. I contemplate the use of a plurality of hoppers 1, but may vary thenumber as desired.

Extending at right angles to the end 3 of each of the ducts 2 isprovided a nozzle, as 1, extending into a suitable hood, as 5, andprovided at its inner end with a rifled tip, as 6, which tip may besecured in position by l means of a threaded screw, as 7, or in anyother suitable manner. The arrangement of each of the nozzles 4 is suchthat its discharge-opening is directly opposite that of a similar nozzleupon the other side of hood 5.

The bottom of hood 5 is preferably formed with a portion slantingupwardly from each of nozzles 4 toward the center of the hood, as at S,and then downwardly, as at 9, and the center thereof is adapted to bepierced by a suction-pipe, as 10, which pipeis made in two parts, oneextending from below as far upward into the said hood 5 as may bedesired,

as at 11, and the other part, directly above the first part and spacedtherefrom, extends out through the top of hood 5 and to any suitablereceiving-chamber for the pulverized material carried by the drafttherein.

The slanting portions 9 of the bottom of hood 5 are formed in suchmanner as to lead to conduits, as 12 12, upon opposite sides of saidhood, and said conduits preferably empty into hoppers, as 13 13,provided with comparatively short ducts, as 11h 14, leading tooppositely-disposed nozzles, as 15, which are exact duplicates ofnozzles 1.

A supply'pipe, as 16, is preferably provided upon either side of hood 5,and is adapted, by means of branch pipes, as 17 17, leading to thevarious nozzles employed, to supply steam or othersuitable pressurethereto, preferably through centrally-arranged nozzles, as 18, withinnozzles 4 and 15.

I find that the tips 6 become worn by constant use and must be replacedoccasionally, and in order to accomplish this I have provided aperturesat suitable points in hood 5 and in the lower end of suction-pipe 10,adapted to be filled by threaded caps, as 19, whereby the hand may bepassed into the interior of the apparatus for removing and replacingsaid tips. The provision of tip 6 with its rifled interior wall is animportant feature of the present invention, and it will be seen thateither right or left hand rifling may be used; but all of the tips inone device must be provided with rifling running in the same direction,and the said tips being arranged opposite each other will give thematerial passed therethrongh a whirling movement revolving in oppositedirections.

Near the bottom of suction-pipe is preferably provided any suitable formof wastepipe, as 20.

In the operation of my improved pulverizer the material to be pulverizedis placed within hopper, orv hoppers l and fed down ducts 2 into thebody of the nozzles 4, where it is brought under the influence of steamor other pressure from nozzle 18 and driven through the rifled tips 6,whereby a rotary motion is imparted to the same, and the said nozzles 4being directly opposite each other will direct the two streams ofmaterial revolving in opposite directions against each other, andthereby pulverize the said material. The

pulverized portions of material then follow the current of pressure asit escapes through pipe 10 and are adapted to be caught in any suitablereceptacle intermediate the length of said pipe 10. Any particles of thematerial not pulverized are drawn by the action of the escaping pressureover the upward slant 8 of the bottom of hood 5, and the said particlesthen drop by weight down slant 9, through ducts 12, hoppers 13, andducts 14,

- into nozzles 15, where it undergoes another operation exactly similarto that just described, and the pulverized material is drawn up pipe 10,and whatever material may yet remain not pulverized may escape throughwaste-pipe 20 and may, if desired, be returned to hopper 1.

It will be readily seen by those skilled in the art that a more powerfulgrinding and pulverizing action is obtainedbythe means for contactingtwo streams of oppositely-revolving material than can be otherwiseobtained, and this is one of the most important features of myinvention.

Although I have described in detail one specific embodiment of myinvention, yet I do not wish it-understood that I mean to limit myselfto the exact construction. specified, but shall feel at liberty todeviate from the [size, shape, and minor details of the present devicewithin 'the spirit and scope of my invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. A pulverizer, comprising in its construction means for supplyingmaterial to be pulverized, oppositely-disposed, similarly-rifled nozzlesto which said material is supplied, and means for forcing said materialthrough said'nozzles, whereby the stream of material from one nozzle isrevolved in an opposite direction to the revolutions of the stream ofmaterial from the opposite nozzle, substantially as described.

2. A pulverizer, comprising in its construction a suitable hood, hoppersabove said hood for supplying material to be pulverized,oppositely-disposed, similarly-rifled nozzles extending into said hood,ducts leading from said supply-hoppers to said nozzles, means forsupplying fluid-pressure to said nozzles,

whereby the material from said hopper will be forced in a whirlingstream from each of said nozzles and the said streams from the twoopposing nozzles caused to contact centrally of the intermediate space,and means for conducting said pulverized material from said hood,substantially as described.

3. A pulverizer, comprising in its construction a hood, a draft-ductleading therefrom and formed of two parts, one extending from beneathsaid hood into the same,and another above the upper end of said lowerpart and spaced therefrom and leading from said hood, a plurality ofoppositely-arranged nozzles extending into said hood, means forsupplying fluid-pressure to said nozzles, means'for supplying materialto be pulverized to said nozzles, whereby said fluid-pressure will forcematerial from said nozzles, the material fro i one nozzle impactingagainst the material of its opposing nozzle, and beingpulverized\thereby, oppositely-arranged nozzles extendipg into saidlower part of the draft-duct and provided with similar means forpulverizing material as said first-mentioned nozzles, ducts leading fromsaid hood to said lower nozzles, and an elevation formed in the floor ofsaid hood between said first-men tioned nozzles and said-ducts leadingto the lower nozzles, the construction and arrangement being such thatafter the first impact the pressure from the upper nozzles escapesthrough said draft-duct and carries with it the pulverized material, andthat part of the material not pulverized is drawn by said pressure oversaid elevation in the floor of said hopper and permitted to drop intothe ducts leading to the lower nozzles, whereby it is subjected to asecond concussion and the material pulverized thereby is carried withthe escaping pressure out said draftduct, substantially as described.

4. The combination of a nozzle, a delivery or discharge tip removablysecured in the end of said nozzle; means of supplying material to bepulverized thereto, and a forcing-conduit delivering into said nozzle;said tip hav ing a rifled bore for imparting rotation to the materialbeing forced through the same.

5. In a pnlverizer, the combination of a pair of rifled nozzles adaptedto have the material to be pulverized forced therethrough, said nozzlesbeing arranged opposite each other whereby the meeting of the streams ofmaterial is adapted to pulverize the same, of means for imparting anoppositely-rotating motion to said streams of material, consisting ofsimilarly, internally rifled dischargetips adapted to be applied to saidnozzles, substantially as described.

In testimony whereof I hereunto affix my signature in presence of twowitnesses.

l/VM. F. MCGLELLAN.

Witnesses:

G. WARD KEMP, H. P. CAMPBELL.

